Jet augmenter or ejector



Sept. 2, I924.

J. F. KIRGAN JET AUGM-ENTER on smc'ron Filed July 20, 1922 &

Patented Sept. 2 1924.

UNITED STATES PATENT OFFICE.

JOHN F. KIBGAN, OF P HILLIPSBURG, NEW JERSEY, ASSIGNOR TO INGERSOLLRAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORIORATION OF NEW JERSEY.

JET AUGMENTER OR EJ'ECTOR.

Application filed July 20, 1922. Serial no. 576,303.

To all whom it may concern:

Be it known. that 1, JOHN F. KnicAN, a citizen of the United States, and a resident of Phillipsburg, county of \Varren, State of New Jersey, have invented a certain Jet Augmenter 0r Ejector, of which the following is a specification, accompanied by drawmgs.

This invention relates to jet augmenters or ejectors, particularly for augmenting fluid pressure in any desired apparatus, such as a con-denser, coo er or similar vessel, by means of fluid jets, in which the nozzle is adapted to separate the fluids emitted from the noz-' zle into a plurality of separate enveloping layers or strata which later commingle. The primary object of the invention is to simplify and improve the construction of the augmenter or ejector and to cause the steam to be emitted from the nozzle in the form of an annular ring or jet, so that a large area is provided. inside and outside of the annular jet of steam for the entrainment of the air and other vapors from the condensen.

A further isto construct the ring nozzle and diffuser of few parts and of such shape that they effectively cooperate with each other to cause the steam emitted from the nozzle in the form of a ring jet or envelope to surround a core of air and vapor, the steam jet being itself surrounded by an envelope of air or vapor.

Further objects will later appear and to the ends set forth my invention consists'in the features of construction and operation described in the following s ecification and illustrated in one of its pro erred forms in the accompanying drawings, in which the figure is a longitudinal sectional elevation of an ejector.

Referring to the drawings, the body portion or diffuser A of the ejector is cast or otherwise constructed in one piece and as shown is formed with the contracted throat B having the enlarged outlet C at one end of the body, preferably surrounded by'the securingflang'e D which may. be provided with securing a rtures andfastening means (not shown by means of which the ejector is secured in position on the desired apparatus with which it is to be used. The inlet E of the ejector, for air or other vapor, or both, is preferably formed in a straight tubular portion F of the body extending at an angle to the longitudinal axis of the ejector, in this instance the inlet E being shown at right angles to said axis and provided with the securing flange G. The body A may also be provided withthe longitudinal strengthening ribs or flanges H.

A nozzle aperture J is provided at the end of the body portion opposite the outlet C for the insertion of a nozzle body K in axial alignment with the throat B. It is. important that the nozzle aperture J shall be concentric with the throat of the diffuser for good operation. The nozzle body K is provided witha pipe L connected to an exterior source of fluid supply, which ma be steam, and an externally screw threade portion 0 which is adapted to cooperate with a screw threaded portion P of the nozzle aperture J for removably connecting the nozzle body K to the difl'user body A. A nut Q. is preferably formed on the nozzle body to facilitate adjustment, and the nozzle flange R is adapted to bear against the body A'and form a tight joint. The meeting surfaces of the flange R and body A are preferably machined so as to be true with each other and the parts are preferably constructed and adjusted with the outlet of the nozzle in proper position relative to the throat 13, although the nozzle L maybe adjusted longitudinally in different positions if required by inserting a spacer in the form of a washer or packing material between the meeting surfaces of the-flange R and the body A. v

The nozzle body K is formed with an inner tubular extension S, an outer annular flange T, and an annular chamber U between the tubular extension S and flange T. The tubular extension S projects slightly beyond the end of the flange T and the outer cylindrical wall of th extension S gradually decreases in diameter toward the outer end and chamber U beginning at a point .lV just within the end of the flange T. An annular ring or cap V having a reduced diameter screw threaded portion is adapted to be threaded into the flange T which is provided with internal screw )5 with the tubular extension s for forming an annular passage or ring Z which is provided with a restricted throat adjacent the annular chamber U ,in order'to increase the velocit of the fluid passing from the chamber A lon itudinal passage a located in one side of the nozzle body K, maintains communication between the chamber U and the steam inlet L. The longitudinal' passage b extending through the tubular extension S concentrically with the ring passage Z communicates with a transverse passage 0 in the nozzle body K and the passage 0 is open to communication with the inlet E.

Live steam entering the nozzle through the steam connection L and passing through the communicating passage a into the an nular chamber U 'and from thence to the ring passage Z in theend of the nozzle, is

adapted to flow into the throat B and.

through the diffuser in the form of an envelope surrounding the air or vapor, or both, passing from, the inlet E and into and through the communicating passages c and b. This envelope of steam is itself surrounded by an outer envelope of the same medium which flows through the passages sand 6, this outer envelope being formed by the fluid from the inlet E flowingaround the sides of the nozzle and downwardly past the end of the nozzle between the interior wall of the diffuser and the envelope of steam. The mixture flowing into the throat B thus consists of an outer envelope of air or vapor, an inner envelope of steam and a core of vapor or air from the same source as the vapor or air of the outer with said throat having a central orifice to conduct fluid from said inlet in the direction of said throat and an annular chamber for steam surrounding said orifice and an annular ringthreaded into said nozzle and forming an annular passage associated with said-annular chamber and adapted to eject a hollow jet of steam surrounding and surrounded by the fluid to be ejected and entrained thereby.

2. A jet augmenter or ejector comprising a body portion formed with an inlet, a throat and an outlet, and a ring nozzle removably connected to the inlet of the body, said ring nozzle including a body portion and a cap, a tubular extension on said body having a central passage in communication with said inlet, an annular passage around said tubular extensionwithin said cap and a longitudinal passagein said body portion communicating with said annular passage, said nozzle being adapted to direct an envelope of one fluid into said throat, said envelope surroundin a core of another fluid and beingitse f surrounded by an envelope of said second mentioned fluid.

In testimony whereof I have signed this JOHN RKIRGAN.

specification. 

